The Mailbox

Two targeted solutions with ready-to-teach resources for PreK–Grade 6 educators

What are they?

The Mailbox supports PreK–Grade 6 educators with over 54,000 teacher-created resources—including worksheets, activities, games, and crafts—designed to simplify lesson planning, boost engagement, and build key skills across core subjects.

This single-educator membership hub offers thousands of standards-aligned PreK–6 resources, including ready-to-use worksheets, lesson plans, and planning tools.
Ready-to-teach resources for PreK–Grade 6 schools and public libraries.
Interested in learning more?
Quote

The Mailbox Plus is a lifesaver—whether I need a quick activity, a full lesson, or just inspiration, it’s all there and ready to go. It’s like having a master teacher in my back pocket.”

Mrs. Moore, 2nd Grade Teacher

Take a closer look

Videos
Getting To Know Credo Source
User Guide
Four Keys to Using Credo Source in Instruction
Let's Connect

Have questions? Want to see a demo? Connect with an expert however you like: email, phone, video, or in person.

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